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The province of Jaen (Southern Spain) has one of the largest concentrations of medieval fortresses of all Europe. Moreover ancient\udIberian settlements located in <i>oppida</i> (fortified villages) and dated at VI-IV BC also are outstanding examples of historical heritage\udlandmarks in the region. Most of these places are being restored or under documentation analysis to prevent their progressive\uddeterioration. These places have several geometric characteristics in common, such as isolated locations, elongated shapes, largemedium\udsize objects (in the order of tens to few hundred of meters), architectural features with vertical development (such as\udmasonry or rammed earth walls, towers, gates, battlements, etc) or without it (walls, buildings or paths layouts at ground level). The\udobject size, the required level of details and accuracy (of the order of some few cm) and both vertical and horizontal features imply\udthat present UAS techniques can be advantageously used with respect to conventional aerial and terrestrial photogrammetric\udtechniques. Vertical stereoscopic and oblique convergent UAS photogrammetric networks combined with processing techniques\udbased on Structure from Motion (SfM) algorithms allow detailed low cost 2D/3D products. The proper selection of the UAS, camera,\udimage acquisition mode (stop and/or cruising), the network and the processing software will determine the quality of final products\udand their usefulness in metric documentation, 3D modelization or museology. The efficiency of the use of UAS has been analyzed in\udseveral selected examples in Jaen (Burgalimar and Berrueco castles, Xth and XIIIth centuries, respectively, and the Iberian Puente\udTablas oppidum, Vth-IVth centuries BC)

the international archives of the photogrammetry, remote sensing and spatial information sciences/international archives of the photogrammetry, remote sensing and spatial information sciences

RECORDING AND MODELING OF FORTRESSES AND CASTLES WITH UAS. SOME STUDY CASES IN JAEN (SOUTHERN SPAIN)